TWI580567B - Method and article for forming metal / ceramic article with no laser sintering powder lumping device - Google Patents

Description

Method for molding metal/ceramic articles by laser-free sintered powder laminating device and product thereof

The present invention relates to a method for molding a metal/ceramic article by a laser-free sintered powder laminating device and a product thereof, and more particularly to a method for producing a finished product by outputting a semi-finished product through a laser-free sintered powder laminating device and then sintering at a high temperature. Its products.

At present, most of the metal products are formed by conventional mechanical processing. Since the conventional machining cannot mold some special shapes, recently, a manufacturer has developed a metal powder which is plasticized into a mold by injection. In the middle molding, the semi-finished product is taken out after the mold is opened, and the semi-finished product is sintered to obtain a metal product. The manufacturing method can be, for example, the "metal injection molded article and its manufacturing method" of the invention patent application No. 097110042, the bulletin number is No. I398311, the conventional metal injection manufacturing method provides a stud with a threaded hole in the stud; the metal powder and the binder are uniformly mixed into a feed; the feed is made 2~15 micron particles; the granule is heated into a plasticized state and injected into a cavity of an injection mold to form a blank body, the blank body is formed with a matching hole, the shape and size of the matching hole and the stud The shape and the size are equivalent; the stud is placed in the mating hole of the blank to form a preform; the preform is degreased to remove the binder in the blank; After degreasing of the preform sintering process.

It is known in the manufacturing method disclosed in the above-mentioned prior patents that the method must first prepare a mold to form a semi-finished product by the cavity of the mold, and thus the conventional manufacturing. In this way, when the producers of each shape of the article, they must bear the cost of manufacturing the mold and the loss of the mold, resulting in an increase in manufacturing costs, which is simply unaffordable for small and medium-sized enterprises, small-scale studios or individuals. The cost has led to the inability to use the technology in general; in addition, due to the prior art, the mold is subject to the required ejection path during demolding, and therefore cannot be shaped into any shape, such as a complicated curved surface or Multi-layer hollow body, and it is obvious that there is a need for improvement.

In view of this, the inventors of the present invention have added research and innovation to disclose the manufacturing method disclosed by the present invention.

The object of the present invention is to provide a method for molding a metal/ceramic article by a laser-free sintered powder laminating device and a product thereof, which are obtained by mixing a metal powder or a ceramic powder with a bonding agent into a mixture and passing through a laser-free sintering process. The powder laminating device is output molded, and then subjected to high-temperature sintering to obtain a finished product manufacturing method; and the product thereof refers to a product obtained by the above method.

The above-mentioned laser-free sintered powder laminating device (3D Printer) has been widely used for molding non-metallic or ceramic materials such as plastics, and its structure is not the subject of the present invention, and therefore will not be described.

The method for molding a metal/ceramic article by a laser-free sintered powder laminating device discloses a method of mixing 85% to 95% by weight of metal powder or ceramic powder with a binder of 5% to 15% by weight. After the mixture, the mixture is placed in a commercially available, non-laser sintered powder laminating apparatus that receives an instruction and stacks the bonded and layered layers in a 3 degree space according to the instruction. The metal powder or additive manufacturing is mixed to complete the semi-finished product corresponding to the input instruction. The above instructions refer to A graphics software, multimedia carrier, wireless or wired transmission to the electronic signal of the laser-free sintered powder lamination device.

The invention discloses a method for molding a metal/ceramic article by a laser-free sintered powder laminating device, wherein a metal powder or a ceramic powder is mixed with a bonding agent to form a mixture, and the mixture can be directly utilized by a commercially available lower-order non-laser sintering. The powder laminating device is formed into a semi-finished product, and by forming the layer-by-layer forming property, a semi-finished product having an arbitrary shape inside can be formed without being restricted by the conventional mold forming, and the semi-finished product of the present invention is placed in a high-temperature furnace. Sintering at 600~1800 °C to obtain finished metal or ceramic.

The invention discloses a method for molding a metal/ceramic article by a laser-free sintered powder laminating device, which comprises: 1. mixing a metal powder or a ceramic powder with a bonding agent, and directly passing the mixture through a non-laser sintering powder. The semi-finished product obtained by laminating the layering device; 2. the semi-finished product is subjected to a degreasing process to remove the bonding agent in the semi-finished product; and 3. The semi-finished product after degreasing is placed at 600-1800 ° C for sintering to obtain a finished product.

In the above manufacturing method, the degreasing process can be degreased or placed in a high temperature zone of 150 to 550 ° C for high temperature degreasing, and the present invention does not limit its degreasing method.

The molding method disclosed in the present invention, wherein the bonding agent refers to a thermoplastic plastic, a paraffin wax, a thermosetting plastic or the like.

The method disclosed in the present invention can be clarified by the following description and the accompanying drawings.

(1)‧‧‧Without laser sintered powder laminating device

(2) ‧‧‧ stove

First Figure: A flow chart of a first embodiment of the present invention.

Second Figure: A flow chart of a second embodiment of the present invention.

Referring to the first figure, the present invention relates to a method for molding a metal/ceramic article by a laser-free sintered powder laminating apparatus and an article thereof, which are obtained by mixing a metal powder or a ceramic powder with a bonding agent. The mixture is passed through a laser-free sintered powder laminating apparatus (1) to output a semi-finished product, and then sintered at a high temperature to obtain a finished product. The product is a product obtained by the above method.

The invention discloses a method for molding a metal/ceramic article by a laser-free sintered powder laminating device, wherein a metal powder or a ceramic powder of 85% to 95% by weight is mixed with a binder of 5% to 15% by weight. After forming the mixture, the mixture is placed in a commercially available laser-free sintered powder laminating apparatus (1, such as a 3D Printer for molding a non-metallic model), and the laser-free sintered powder laminating apparatus (1) receives an instruction. According to the instruction, in the three-dimensional space, the metal powder or additive manufacturing which has been mixed with the bonding agent is stacked layer by layer to complete the semi-finished product corresponding to the input instruction. The above input command refers to an electronic signal transmitted to the laser-free sintered powder laminating device through a drawing software, a multimedia carrier, a wireless or a wired method. The above instructions are transmitted to the laser-free sintered powder laminating apparatus through a drawing software, a multimedia carrier (such as a removable memory, a compact disc, a portable hard disk, etc.), wirelessly or by wire.

The metal powder, the bonding agent, the ceramic powder and the bonding agent are kneaded in an environment of 100 to 300 ° C, and the bonding agent can be uniformly coated on the mixture of the metal powder or the ceramic powder, even if each The periphery of the particles of the metal powder or ceramic powder may be coated with a bonding agent to enhance stability between the metal powders or ceramic powders during the lamination molding. The ground is then shaped.

The main feature of the method disclosed in the present invention is that after the metal powder or the ceramic powder is mixed with the bonding agent to form a mixture, the powder can be directly formed by using a commercially available lower-order non-laser-sintering powder laminating device. The layer-by-layer forming property can form a semi-finished product having an arbitrary shape inside, and is not limited by the conventional mold forming and shape. The semi-finished product of the present invention is placed in a high-temperature furnace for sintering at 600 to 1800 ° C to obtain Finished metal or ceramic finished product.

The method disclosed in the present invention, wherein the selected metal powder or ceramic powder has a particle size of between 0.1 μm and 100 μm.

The method disclosed in the present invention, as shown in the second figure, includes: 1. After metal powder or ceramic powder is mixed with a bonding agent to form a mixture, directly formed by a laser-free sintered powder laminating device (1), The semi-finished product is obtained; 2. The semi-finished product is subjected to a degreasing process to remove the bonding agent in the semi-finished product; and 3. The degreased semi-finished product is placed at 600-1800 ° C for sintering to obtain a finished product.

In the above method, the degreasing process is degreased by a solvent or placed in a high temperature zone of 150 to 550 ° C for high temperature degreasing, and the present invention does not limit its degreasing method.

The method of the present invention, wherein the metal powder may be aluminum, titanium, tungsten, iron, alloy, etc., and the ceramic powder refers to alumina, zirconia, etc., and the metal powder is not limited in the present invention. Or the type of the ceramic powder; the method disclosed in the present invention, wherein the sintering temperature applied to the aluminum metal powder molding may be 600 ° C; the sintering temperature of the tungsten metal powder molding may be 1500 ° C; and the sintering temperature of the ceramic powder may be 1800 ° C.

The invention is in the embodiment shown in the second figure, wherein the laser-free sintered powder is passed The final layering device (1) is formed, and the semi-finished product can be placed in a stove (2), and the degreasing and sintering process is completed during the heating process.

According to the method disclosed in the present invention, since the laser-free sintered powder laminating device has the advantages of low cost, easy availability, small volume and no space occupation, the present invention is more easily used for general SME users, SOHO families, and personal modeling studios. The invention discloses that the manufacturing method disclosed by the invention has extremely high economic value; in addition, the invention can solve the defects that the current finished product can not be made into a shape of a special article by means of metal mold opening, and the invention can be formed by the invention. The shape is no longer limited, more in line with the needs of the industry, and its novelty and progress.

The method disclosed in the present invention can be modified and applied without departing from the spirit and scope of the invention, and the invention is not limited.

(1)‧‧‧Without laser sintered powder laminating device

Claims (7)

A method for molding a metal/ceramic article by a laser-free sintered powder laminating device, which comprises mixing a metal powder or a ceramic powder with a bonding agent to form a mixture, and then passing the mixture through a laser-free sintered powder laminating device to output a semi-finished product, and then a method for producing a finished product by high-temperature sintering; wherein the mixture is mixed with a metal powder or a ceramic powder of 85% to 95% by weight, mixed with a binder of 5% to 15% by weight, and subjected to an environment of 100 to 300 ° C Mixture obtained by mixing. A method of molding a metal/ceramic article by a laser-free sintered powder laminating apparatus as claimed in claim 1, wherein the sintering temperature is 600 to 1800 °C. A method of molding a metal/ceramic article by a laser-free sintered powder laminating apparatus as claimed in claim 1, wherein the selected metal powder or ceramic powder has a particle size of between 0.1 μm and 100 μm. A method of molding a metal/ceramic article by a laser-free sintered powder laminating apparatus as claimed in claim 1, wherein the semi-finished product is subjected to a degreasing process to remove the bonding agent in the semi-finished product before sintering. A method of molding a metal/ceramic article by a laser-free sintered powder laminating apparatus as claimed in claim 4, wherein the degreasing process is degreased with a solvent. According to the method of claim 4, the metal/ceramic article is formed by the laser-free sintered powder laminating device, and the semi-finished product is placed in a high temperature region of 150 to 550 ° C for high-temperature degreasing. The semi-finished product is obtained by the method of molding the metal/ceramic article without the laser-sintered powder laminating device as described in claim 4, and is placed in a stove, and the degreasing and sintering process is completed during the heating process.